CN104125645A - Control channel element (CCE) aggregation level determination method and device - Google Patents

Abstract

The invention discloses a control channel element (CCE) aggregation level determination method and a CCE aggregation level determination device. The CCE aggregation level determination method and the CCE aggregation level determination device are used to prevent performances of a PDCCH (physical downlink control channel) and a PDSCH (physical downlink shared channel) from being bound, and improve capacity of the PDCCH on the premise of guaranteeing the performances of the PDCCH. The CCE aggregation level determination method includes: revising spectrum effectiveness of the PDSCH according to different MIMO (multiple input multiple output) transmission modes in each preset CQI (channel quality indicator) reporting cycle so as to obtain equivalent PDCCH spectrum efficiency; confirming initial value of each CCE according to the equivalent PDCCH spectrum efficiency; judging whether a detection leak phenomenon exists in UE after a current CCE aggregation level is used, and confirming a CCE level of adjusting the PDCCH at present according to a judgment result; redefining the CCE aggregation level currently used according to the CCE level of adjusting the PDCCH at present and the initial value of each CCE.

Description

A kind of control channel unit polymerization classification method and device

Technical field

The present invention relates to communication technical field, relate in particular to a kind of control channel unit (Control Channel Element, CCE) polymerization classification method and device.

Background technology

Long Term Evolution (Long Term Evolution, LTE) or senior Long Term Evolution (Long Term Evolution Advanced, LTE-A) system adopts Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) carry up-downgoing schedule information, the performance of PDCCH can be used control channel unit (Control Channel Element, CCE) polymerization grade size (CCE=1, 2, 4, 8) weigh, higher grade of CCE polymerization, the performance of PDCCH is better, false dismissal probability is lower, but the resource that takies control channel is more, subscriber equipment (the User Equipment that system can be carried, UE) number is fewer, lower grade of CCE polymerization, the performance of PDCCH is poorer, can cause false dismissal probability to increase, once it is undetected that control information occurs, the transmission of this business datum also just makes a mistake, reduce the throughput performance of UE.

LTE PDCCH bearing downlink control information (Downlink Control Information, DCI), comprises that concrete DCI form and purposes are as shown in table one below for the schedule information of descending and transmitting uplink data and uplink power control information etc.PDCCH adopts the mode of many UE shared resource, and UE need to be in whole control area according to certain rule search control signal.In the DCI of PDCCH information, pass through the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI of UE (Cell Radio Network Temporary Identity, C-RNTI) scrambling is to 16 bits (bit) cyclic redundancy check (CRC) (Cyclic Redundancy Check, CRC) mode, the object UE that implicit expression indicates this DCI to send.In order to support link circuit self-adapting, reduce the complexity that UE detects PDCCH, PDCCH resource mapping YiCCEWei unit, a CCE is by 9 resource unit group (Resource Element Group, REG) 36 Resource Units (Resource Element, RE) form.According to the length of carrying DCI bit and the link-quality of UE, a DCI can be carried by 1,2,4 or 8 CCE of choice for use in base station, is called CCE polymerization grade.

Table one: DCI form and purposes

The descending PDCCH of LTE is divided into cell-level PDCCH and UE level PDCCH.The former carries the control information of cell-level, is mapped to public search space, and public search space is that all UE share, and supports CCE polymerization class 4 or 8; The latter is carried the control information of UE level, PDCCH CRC is by C-RNTI or descending semi-continuous scheduling (the Semi-Persistent Scheduling of UE, SPS) C-RNTI scrambling, be mapped to the exclusive search volume of UE, the exclusive search volume of UE, for each UE, comprises all possible CCE polymerization grade.Under a kind of CCE polymerization grade, the exclusive search volume of UE original position is by decisions such as subframe numbering and terminal RNTI.Difference due to beared information content, cell-level PDCCH resource divides timing mainly to meet community, to be covered as target, the distribution of UE level PDCCH resource mainly be take capacity as target, meeting under the prerequisite of performance requirement, CCE size that UE level PDCCH takies and the size of power are determined according to the CQI of UE feedback in base station, support as far as possible more UE.

Existing implementation comprises:

Step 1: according to different MIMO transmission meanss, the spectrum efficiency eff to PDSCH _pDSCHrevise, obtain the spectrum efficiency eff under equivalent PDCCH _pDCCH;

Due to evolved base station (evolved Node B, eNB) can only be according to channel quality indication (the Channel Quality Indicator of PDSCH, CQI) tentatively judge the link-quality of UE, and the CQI of PDSCH depends on current multiple-input, multiple-output (Most In Most Out, MIMO) transmission means.And the MIMO mode that PDSCH and PDCCH adopt is likely different, therefore need to revises the spectrum efficiency of PDSCH, thereby obtain equivalence to the spectrum efficiency of PDCCH.Therefore have:

eff _PDCCH＝eff _PDSCH+Δ

Parameter declaration is as follows:

Eff _pDSCH: the spectrum efficiency of the instantaneous correction of PDSCH;

Eff _pDCCH: the spectrum efficiency of the instantaneous reconstruct of PDCCH;

Δ: obtain the adjusted value of PDCCH spectrum efficiency according to the spectrum efficiency of PDSCH by the correction of different MIMO mode;

Δ value depends on different MIMO modes, when the MIMO of PDSCH mode is space frequency block coding (Space-Frequency Block Codes, SFBC) time, Δ=0, when the MIMO of PDSCH mode is single current wave beam forming, Δ is negative value, when PDSCH is the MIMO mode of Open-Loop Spatial Multiplexing or dual-stream beamforming, Δ be on the occasion of.

Step 2: according to the spectrum efficiency of PDCCH after revising, with reference to table two below, spectrum efficiency and CCE mapping relations table, carry out the selection of CCE size.

Table two: spectrum efficiency and CCE mapping relations table

CCE size	Spectrum efficiency
		1	CQI10
2	CQI8
		4	CQI6

If eff _pDCCHthe thresholding of >=CCE1, CCE number is 1;

If eff _pDCCHthe thresholding of >=CCE2, CCE number is 2;

If eff _pDCCHthe thresholding of >=CCE4, CCE number is 4;

Wherein, CCE1, CCE2, CCE4 represent respectively 1 CCE, 2 CCE and 4 CCE, and in other situation, CCE number is 8.

In sum, prior art is mainly deposited shortcoming both ways: the one, the performance of the performance of PDCCH and PDSCH is bound, and adopt the instantaneous performance of PDSCH to select the CCE grade of PDCCH, if the MCS grade of the instantaneous selection of PDSCH is improper, can obtain to retransmit and merge gain, once but that PDCCH occurs is undetected, can waste this time resource of transmission; The initial selected of the 2nd, CCE is not distinguished PDCCH DCI length, can cause the CCE selecting limited, the resource of waste PDCCH.

Summary of the invention

The embodiment of the present invention provides a kind of CCE polymerization classification method and device, the performance of PDCCH and PDSCH is bound in order to avoiding, and guarantees to promote on the basis of PDCCH performance the capacity of PDCCH.

A kind of CCE polymerization classification method that the embodiment of the present invention provides comprises:

The channel quality indicator (CQI) report cycle setting in advance at each, according to different multiple-input, multiple-output MIMO transmission meanss, revises the spectrum efficiency of physical down link sharing channel PDSCH, obtains the spectrum efficiency of equivalent PDCCH;

According to the spectrum efficiency of the PDCCH of described equivalence, determine the initial value of CCE;

It is undetected whether judgement adopts after current CCE polymerization grade UE to exist, and determine that according to judged result this adjusts the CCE grade of PDCCH;

According to this, adjust the CCE grade of PDCCH, and the initial value of CCE, redefine the CCE polymerization grade of current employing.

Pass through the method, according to the false dismissal probability of statistics PDCCH, determine which CCE polymerization grade PDCCH should adopt actually, no longer the performance of PDCCH and PDSCH is bound, according to the detection performance of channel quality information and PDCCH self, select suitable CCE size adaptively, consider the throughput performance of power system capacity and UE, on the basis that guarantees PDCCH performance, rationally promote the capacity of PDCCH.

Preferably, adopt following formula to revise the spectrum efficiency of PDSCH, obtain the spectrum efficiency of equivalent PDCCH:

eff _PDCCH＝eff _PDSCH+Δ

Wherein, eff _pDCCHthe spectrum efficiency that represents the PDCCH of described equivalence, eff _pDSCHthe spectrum efficiency that represents PDSCH, Δ represents to obtain by different MIMO transmission means corrections according to the spectrum efficiency of PDSCH the adjusted value of the spectrum efficiency of PDCCH, when the MIMO of PDSCH transmission means is SFBC, Δ=0, when the MIMO of PDSCH transmission means is single current wave beam forming, Δ is negative value, when PDSCH is the MIMO transmission means of Open-Loop Spatial Multiplexing or dual-stream beamforming, Δ be on the occasion of.

Preferably, according to the spectrum efficiency of the PDCCH of described equivalence, determine the initial value of CCE, comprising:

The spectrum efficiency of the PDCCH of described equivalence is carried out smoothly, obtain the spectrum efficiency of the PDCCH after level and smooth;

According to the spectrum efficiency of described PDCCH after level and smooth, determine the initial value of CCE.

By the spectral efficiency values of PDSCH being carried out smoothly, avoid single shake to cause the false dismissal probability of PDCCH to increase.

Preferably, adopt following formula to carry out smoothly the spectrum efficiency of the PDCCH of described equivalence, obtain the spectrum efficiency eff of the PDCCH after level and smooth _{pDCCH_new};

eff _{PDCCH_new}(i)＝(1-α)·eff _{PDCCH_new}(i-1)+α·eff _PDCCH

Wherein, i represents current C QI report cycle point, and α represents default smoothing factor, eff _pDCCHthe spectrum efficiency that represents the PDCCH of described equivalence.

Preferably, according to the spectrum efficiency of described PDCCH after level and smooth, determine the initial value of CCE, comprising:

According to spectrum efficiency and the Downlink Control Information DCI length of described PDCCH after level and smooth, with reference to the spectrum efficiency of PDCCH and the mapping relations table of the initial value of CCE under this default DCI length, determine the initial value of CCE.

DCI for different length arranges different CCE and the threshold value of spectrum efficiency, passes through V parameter _{add_sum}embody the performance difference of PDSCH and PDCCH, make the CCE selecting more reasonable, on the basis that guarantees PDCCH performance, effectively promote the capacity of PDCCH.

Preferably, it is undetected whether judgement adopts after current CCE polymerization grade UE to exist, and determine that according to judged result this adjusts the CCE grade of PDCCH, comprising:

It is undetected whether judgement adopts after current CCE polymerization grade UE to exist, if so, and V _add=-Kstep, otherwise, V _add=step;

Wherein, V _addthe CCE grade that represents this adjustment PDCCH, K represents the CCE level adjustment step-length of PDCCH of intoo drastic biopsy survey and the ratio of the CCE level adjustment step-length of the PDCCH that too drastic biopsy is surveyed preset, after step represents that the too drastic biopsy of default PDCCH is surveyed, the CCE level adjustment step-length that this PDCCH is corresponding.

Preferably, utilize following formula, according to this, adjust the CCE grade of PDCCH, and the initial value of CCE, redefine the CCE polymerization grade of current employing, comprising:

V _{add_sum}＝V _{add_sum}+V _add

Redefine CCE polymerization grade=floor (CCE of current employing _init+ V _{add_sum})

Wherein, V _addthe CCE grade that represents this adjustment PDCCH, floor () represents to round downwards, CCE _initthe initial value that represents CCE.

Preferably,

If floor is (CCE _init+ V _{add_sum}) equaling 1, the CCE polymerization grade of the current employing redefining is 1;

If floor is (CCE _init+ V _{add_sum}) equaling 2, the CCE polymerization grade of the current employing redefining is 2;

If floor is (CCE _init+ V _{add_sum}) equaling 3, the CCE polymerization grade of the current employing redefining is 4;

If floor is (CCE _init+ V _{add_sum}) equaling 4, the CCE polymerization grade of the current employing redefining is 8.

A kind of control channel unit CCE polymerization classification device that the embodiment of the present invention provides, comprising:

Equivalent unit, for the channel quality indicator (CQI) report cycle setting in advance at each, according to different multiple-input, multiple-output MIMO transmission meanss, revises the spectrum efficiency of physical down link sharing channel PDSCH, obtains the spectrum efficiency of equivalent PDCCH;

CCE initial value determining unit, for according to the spectrum efficiency of the PDCCH of described equivalence, determines the initial value of CCE;

Judging unit, for judging that to adopt after current CCE polymerization grade UE whether to exist undetected, and determines that according to judged result this adjusts the CCE grade of PDCCH;

Determining unit, for adjust the CCE grade of PDCCH according to this, and the initial value of CCE, redefines the CCE polymerization grade of current employing.

By this device, according to the false dismissal probability of statistics PDCCH, determine which CCE polymerization grade PDCCH should adopt actually, no longer the performance of PDCCH and PDSCH is bound, according to the detection performance of channel quality information and PDCCH self, select suitable CCE size adaptively, consider the throughput performance of power system capacity and UE, on the basis that guarantees PDCCH performance, rationally promote the capacity of PDCCH.

Preferably, described equivalent unit adopts following formula to revise the spectrum efficiency of PDSCH, obtains the spectrum efficiency of equivalent PDCCH:

eff _PDCCH＝eff _PDSCH+Δ

Wherein, eff _pDCCHthe spectrum efficiency that represents the PDCCH of described equivalence, eff _pDSCHthe spectrum efficiency that represents PDSCH, Δ represents to obtain by different MIMO transmission means corrections according to the spectrum efficiency of PDSCH the adjusted value of the spectrum efficiency of PDCCH, when the MIMO of PDSCH transmission means is SFBC, Δ=0, when the MIMO of PDSCH transmission means is single current wave beam forming, Δ is negative value, when PDSCH is the MIMO transmission means of Open-Loop Spatial Multiplexing or dual-stream beamforming, Δ be on the occasion of.

Preferably, described CCE initial value determining unit specifically for:

The spectrum efficiency of the PDCCH of described equivalence is carried out smoothly, obtain the spectrum efficiency of the PDCCH after level and smooth;

According to the spectrum efficiency of described PDCCH after level and smooth, determine the initial value of CCE.

By the spectral efficiency values of PDSCH being carried out smoothly, avoid single shake to cause the false dismissal probability of PDCCH to increase.

Preferably, described CCE initial value determining unit adopts following formula to carry out smoothly the spectrum efficiency of the PDCCH of described equivalence, obtains the spectrum efficiency eff of the PDCCH after level and smooth _{pDCCH_new};

eff _{PDCCH_new}(i)＝(1-α)·eff _{PDCCH_new}(i-1)+α·eff _PDCCH

Wherein, i represents current C QI report cycle point, and α represents default smoothing factor, eff _pDCCHthe spectrum efficiency that represents the PDCCH of described equivalence.

Preferably, described CCE initial value determining unit is according to the spectrum efficiency of described PDCCH after level and smooth, while determining the initial value of CCE, specifically for:

According to spectrum efficiency and the Downlink Control Information DCI length of described PDCCH after level and smooth, with reference to the spectrum efficiency of PDCCH and the mapping relations table of the initial value of CCE under this default DCI length, determine the initial value of CCE.

DCI for different length arranges different CCE and the threshold value of spectrum efficiency, passes through V parameter _{add_sum}embody the performance difference of PDSCH and PDCCH, make the CCE selecting more reasonable, on the basis that guarantees PDCCH performance, effectively promote the capacity of PDCCH.

Preferably, described judging unit specifically for:

It is undetected whether judgement adopts after current CCE polymerization grade UE to exist, if so, and V _add=-Kstep, otherwise, V _add=step;

Wherein, V _addthe CCE grade that represents this adjustment PDCCH, K represents the CCE level adjustment step-length of PDCCH of intoo drastic biopsy survey and the ratio of the CCE level adjustment step-length of the PDCCH that too drastic biopsy is surveyed preset, after step represents that the too drastic biopsy of default PDCCH is surveyed, the CCE level adjustment step-length that this PDCCH is corresponding.

Preferably, described determining unit is utilized following formula, according to this, adjusts the CCE grade of PDCCH, and the initial value of CCE, redefines the CCE polymerization grade of current employing:

V _{add_sum}＝V _{add_sum}+V _add

Redefine CCE polymerization grade=floor (CCE of current employing _init+ V _{add_sum})

Wherein, V _addthe CCE grade that represents this adjustment PDCCH, floor () represents to round downwards, CCE _initthe initial value that represents CCE.

Preferably,

If floor is (CCE _init+ V _{add_sum}) equaling 1, the CCE polymerization grade of the current employing that described determining unit redefines is 1;

If floor is (CCE _init+ V _{add_sum}) equaling 2, the CCE polymerization grade of the current employing that described determining unit redefines is 2;

If floor is (CCE _init+ V _{add_sum}) equaling 3, the CCE polymerization grade of the current employing that described determining unit redefines is 4;

If floor is (CCE _init+ V _{add_sum}) equaling 4, the CCE polymerization grade of the current employing that described determining unit redefines is 8.

Accompanying drawing explanation

The schematic flow sheet of a kind of CCE polymerization classification method that Fig. 1 provides for the embodiment of the present invention;

The structural representation of a kind of CCE polymerization classification device that Fig. 2 provides for the embodiment of the present invention.

Embodiment

The embodiment of the present invention provides a kind of CCE polymerization classification method and device, in order to select suitable CCE size according to the detection performance of channel quality information and PDCCH self adaptively, consider the throughput performance of power system capacity and UE, on the basis that guarantees PDCCH performance, rationally promote the capacity of PDCCH.

The embodiment of the present invention is in order effectively to solve PDCCH because instantaneous CCE polymerization grade becomes the problem that causes greatly false dismissal probability to increase, and the scheme that the embodiment of the present invention proposes, specifically describes as follows:

The basic thought of this scheme is to determine according to the false dismissal probability of statistics PDCCH which CCE polymerization grade PDCCH should adopt actually, no longer the performance of PDCCH and PDSCH is bound, and specific implementation is as follows.

Referring to Fig. 1, a kind of CCE polymerization classification method that the embodiment of the present invention provides comprises:

S101, the channel quality indicator (CQI) report cycle setting in advance at each, according to different multiple-input, multiple-output MIMO transmission meanss, revise the spectrum efficiency of physical down link sharing channel PDSCH, obtains the spectrum efficiency of equivalent PDCCH;

S102, according to the spectrum efficiency of the PDCCH of described equivalence, determine the initial value of CCE;

It is undetected whether S103, judgement adopt after current CCE polymerization grade UE to exist, and determine that according to judged result this adjusts the CCE grade of PDCCH;

S104, according to this, adjust the CCE grade of PDCCH, and the initial value of CCE, redefine the CCE polymerization grade of current employing.

Pass through the method, according to the false dismissal probability of statistics PDCCH, determine which CCE polymerization grade PDCCH should adopt actually, no longer the performance of PDCCH and PDSCH is bound, according to the detection performance of channel quality information and PDCCH self, select suitable CCE size adaptively, consider the throughput performance of power system capacity and UE, on the basis that guarantees PDCCH performance, rationally promote the capacity of PDCCH.

Preferably, adopt following formula to revise the spectrum efficiency of PDSCH, obtain the spectrum efficiency of equivalent PDCCH:

eff _PDCCH＝eff _PDSCH+Δ

Wherein, eff _pDCCHthe spectrum efficiency that represents the PDCCH of described equivalence, eff _pDSCHthe spectrum efficiency that represents PDSCH, Δ represents to obtain by different MIMO transmission means corrections according to the spectrum efficiency of PDSCH the adjusted value of the spectrum efficiency of PDCCH, when the MIMO of PDSCH transmission means is SFBC, Δ=0, when the MIMO of PDSCH transmission means is single current wave beam forming, Δ is negative value, when PDSCH is the MIMO transmission means of Open-Loop Spatial Multiplexing or dual-stream beamforming, Δ be on the occasion of.

Preferably, according to the spectrum efficiency of the PDCCH of described equivalence, determine the initial value of CCE, comprising:

The spectrum efficiency of the PDCCH of described equivalence is carried out smoothly, obtain the spectrum efficiency of the PDCCH after level and smooth;

According to the spectrum efficiency of described PDCCH after level and smooth, determine the initial value of CCE.

By the spectral efficiency values of PDSCH being carried out smoothly, avoid single shake to cause the false dismissal probability of PDCCH to increase.

Preferably, adopt following formula to carry out smoothly the spectrum efficiency of the PDCCH of described equivalence, obtain the spectrum efficiency eff of the PDCCH after level and smooth _{pDCCH_new};

eff _{PDCCH_new}(i)＝(1-α)·eff _{PDCCH_new}(i-1)+α·eff _PDCCH

Wherein, i represents current C QI report cycle point, and α represents default smoothing factor, eff _pDCCHthe spectrum efficiency that represents the PDCCH of described equivalence.

Preferably, according to the spectrum efficiency of described PDCCH after level and smooth, determine the initial value of CCE, comprising:

According to spectrum efficiency and the Downlink Control Information DCI length of described PDCCH after level and smooth, with reference to the spectrum efficiency of PDCCH and the mapping relations table of the initial value of CCE under this default DCI length, determine the initial value of CCE.

DCI for different length arranges different CCE and the threshold value of spectrum efficiency, passes through V parameter _{add_sum}embody the performance difference of PDSCH and PDCCH, make the CCE selecting more reasonable, on the basis that guarantees PDCCH performance, effectively promote the capacity of PDCCH.

Preferably, it is undetected whether judgement adopts after current CCE polymerization grade UE to exist, and determine that according to judged result this adjusts the CCE grade of PDCCH, comprising:

It is undetected whether judgement adopts after current CCE polymerization grade UE to exist, if so, and V _add=-Kstep, otherwise, V _add=step;

Wherein, V _addthe CCE grade that represents this adjustment PDCCH, K represents the CCE level adjustment step-length of PDCCH of intoo drastic biopsy survey and the ratio of the CCE level adjustment step-length of the PDCCH that too drastic biopsy is surveyed preset, after step represents that the too drastic biopsy of default PDCCH is surveyed, the CCE level adjustment step-length that this PDCCH is corresponding.

Preferably, utilize following formula, according to this, adjust the CCE grade of PDCCH, and the initial value of CCE, redefine the CCE polymerization grade of current employing, comprising:

V _{add_sum}＝V _{add_sum}+V _add

Redefine CCE polymerization grade=floor (CCE of current employing _init+ V _{add_sum})

Wherein, V _addthe CCE grade that represents this adjustment PDCCH, floor () represents to round downwards, CCE _initthe initial value that represents CCE.

Preferably,

If floor is (CCE _init+ V _{add_sum}) equaling 1, the CCE polymerization grade of the current employing redefining is 1;

If floor is (CCE _init+ V _{add_sum}) equaling 2, the CCE polymerization grade of the current employing redefining is 2;

If floor is (CCE _init+ V _{add_sum}) equaling 3, the CCE polymerization grade of the current employing redefining is 4;

If floor is (CCE _init+ V _{add_sum}) equaling 4, the CCE polymerization grade of the current employing redefining is 8.

Provide the explanation of a specific embodiment below.

A kind of CCE polymerization classification method that the embodiment of the present invention provides comprises:

The following parameter of initialization:

Step: after representing that a too drastic biopsy of PDCCH is surveyed, the CCE level adjustment step-length that this PDCCH is corresponding.

K: the ratio that represents the CCE level adjustment step-length of the PDCCH that intoo drastic biopsy is surveyed and the CCE level adjustment step-length of the PDCCH that too drastic biopsy is surveyed.

K is determined by the PDCCH false dismissal probability of initial setting up and current adopted CCE polymerization grade; Whether for the PDCCH of dispatching downlink, can by confirmation (ACK) information of PUCCH or the upper carrying of PUSCH, whether surpass activation detection threshold (has passed through to activate and has detected, for example signal power/the noise power of ACK information is more than or equal to 3.4 and just thinks and detect by activation, signal power/noise power is less than 3.4 and just thinks and by activation, do not detect) judge whether that PDCCH is undetected, if surpass, do not activate detection threshold, determine and exist PDCCH undetected, if surpass, activate detection threshold, determine and do not exist PDCCH undetected; PDCCH for dispatching uplink can judge whether to exist undetected by PUSCH being activated to detection, while there is arbitrary signal on the PUSCH channel of PDCCH indication, determine and do not exist PDCCH undetected, if while there is not any signal on the PUSCH channel of PDCCH indication, determine and exist PDCCH undetected.

M: representing the parameter of the adjustment step-length that different polymerization grades are corresponding, be equivalent to zoom factor, is the constant pre-setting.

Due to signal corresponding to adjacent polymerization grade and interference and noise ratio (Signal to Interference plus Noise Ratio, SINR) difference of value is not identical, therefore need to be for every kind of CCE polymerization grade difference parameters M, for example current C CE number is 8 o'clock, M=2, current C CE number is 4 o'clock, M=2, current C CE number is 2 o'clock, M=5.

V _{add_sum}: the CCE grade of PDCCH is adjusted in accumulation.

V _add: this adjusts the CCE grade of PDCCH.

Wherein, above-mentioned parameter meets following formula:

$\mathrm{step}=\frac{\mathrm{init}\_\mathrm{BLER}}{M}$

$K=\frac{1-\mathrm{init}\_\mathrm{BLER}/M}{\mathrm{init}\_\mathrm{BLER}/M}$

Wherein, init_BLER represents initial false dismissal probability, for example, be one of percentage, is the value pre-setting.

The 1-init_BLER/M adjustment step-length that intoo drastic biopsy is surveyed;

Init_BLER/M is the adjustment step-length that too drastic biopsy is surveyed.

Concrete CCE polymerization classification method comprises:

Step 1: the CQI report cycle pre-setting at each is according to different MIMO transmission meanss, the spectrum efficiency eff to PDSCH _pDSCHrevise, obtain the spectrum efficiency eff of equivalent PDCCH _pDCCH;

eff _PDCCH＝eff _PDSCH+Δ

Wherein, Δ represents to obtain by the correction of different MIMO mode according to the spectrum efficiency of PDSCH the adjusted value of PDCCH spectrum efficiency;

Δ value depends on different MIMO transmission meanss, when the MIMO of PDSCH transmission means is SFBC, and Δ=0, when the MIMO of PDSCH transmission means is single current wave beam forming, Δ is negative value, when PDSCH is the MIMO transmission means of Open-Loop Spatial Multiplexing or dual-stream beamforming, Δ be on the occasion of.

Step 2: adopt following formula to carry out smoothly, obtaining eff to spectral efficiency values corresponding to PDCCH _{pDCCH_new};

eff _PDCCH＝eff _PDSCH+Δ

eff _{PDCCH_new}(i)＝(1-α)·eff _{PDCCH_new}(i-1)+α·eff _PDCCH

Wherein, i represents current subframe, and α represents default smoothing factor, for example, can be 0.125.

Step 3: according to the spectrum efficiency eff of PDCCH after level and smooth _{pDCCH_new}with DCI length information, with reference to table three below, i.e. spectrum efficiency and CCE mapping relations table under different DCI length, carry out the selection CCE of CCE size _init, CCE wherein _initinitial value for CCE.Wherein, DCI length can determine according to the MIMO mode adopting, and for example the DCI length of SFBC is 31 bits, and the DCI length of SDM is 51bit, and the DCI length of PORT5 is 42Bit.

Table three: spectrum efficiency and CCE mapping relations table

Specifically can adopt the mode of the step 2 of mentioning in background technology to determine.

Step 4: it is undetected whether judgement adopts after current CCE polymerization grade UE to exist, if exist undetected, V _add=-Kstep, if do not exist undetected, V _add=step.

Step 5: redefine the CCE polymerization grade=floor (CCE now adopting _init+ V _{add_sum}), V wherein _{add_sum}=V _{add_sum}+ V _add.

Wherein, floor () represents to round downwards.

If floor is (CCE _init+ V _{add_sum}) equaling 1, the CCE polymerization grade of the current employing redefining is 1;

If floor is (CCE _init+ V _{add_sum}) equaling 2, the CCE polymerization grade of the current employing redefining is 2;

If floor is (CCE _init+ V _{add_sum}) equaling 3, the CCE polymerization grade of the current employing redefining is 4;

If floor is (CCE _init+ V _{add_sum}) equaling 4, the CCE polymerization grade of the current employing redefining is 8.

As can be seen here, in the embodiment of the present invention, the spectral efficiency values of PDSCH is carried out smoothly, avoid single shake to cause the false dismissal probability of PDCCH to increase; DCI for different length arranges different CCE and the threshold value of spectrum efficiency; The thresholding that whether too drastic biopsy is surveyed according to PDCCH is revised the CCE of initial selected; The adjusting range difference that different CCE polymerization grades are corresponding, due to 8 CCE to 4 CCE, 4 CCE to 2 CCE and 2 different differences of SINR value difference that CCE to 1 CCE is required, therefore need to arrange different adjusted values for different CCE grades, i.e. the setting of M value.

Correspondingly, referring to Fig. 2, a kind of control channel unit CCE polymerization classification device that the embodiment of the present invention provides, comprising:

Equivalent unit 11, for the channel quality indicator (CQI) report cycle setting in advance at each, according to different multiple-input, multiple-output MIMO transmission meanss, revises the spectrum efficiency of physical down link sharing channel PDSCH, obtains the spectrum efficiency of equivalent PDCCH;

CCE initial value determining unit 12, for according to the spectrum efficiency of the PDCCH of described equivalence, determines the initial value of CCE;

Judging unit 13, for judging that to adopt after current CCE polymerization grade UE whether to exist undetected, and determines that according to judged result this adjusts the CCE grade of PDCCH;

Determining unit 14, for adjust the CCE grade of PDCCH according to this, and the initial value of CCE, redefines the CCE polymerization grade of current employing.

By this device, according to the false dismissal probability of statistics PDCCH, determine which CCE polymerization grade PDCCH should adopt actually, no longer the performance of PDCCH and PDSCH is bound, according to the detection performance of channel quality information and PDCCH self, select suitable CCE size adaptively, consider the throughput performance of power system capacity and UE, on the basis that guarantees PDCCH performance, rationally promote the capacity of PDCCH.

Preferably, described equivalent unit adopts following formula to revise the spectrum efficiency of PDSCH, obtains the spectrum efficiency of equivalent PDCCH:

eff _PDCCH＝eff _PDSCH+Δ

Wherein, eff _pDCCHthe spectrum efficiency that represents the PDCCH of described equivalence, eff _pDSCHthe spectrum efficiency that represents PDSCH, Δ represents to obtain by different MIMO transmission means corrections according to the spectrum efficiency of PDSCH the adjusted value of the spectrum efficiency of PDCCH, when the MIMO of PDSCH transmission means is SFBC, Δ=0, when the MIMO of PDSCH transmission means is single current wave beam forming, Δ is negative value, when PDSCH is the MIMO transmission means of Open-Loop Spatial Multiplexing or dual-stream beamforming, Δ be on the occasion of.

Preferably, described CCE initial value determining unit specifically for:

The spectrum efficiency of the PDCCH of described equivalence is carried out smoothly, obtain the spectrum efficiency of the PDCCH after level and smooth;

According to the spectrum efficiency of described PDCCH after level and smooth, determine the initial value of CCE.

By the spectral efficiency values of PDSCH being carried out smoothly, avoid single shake to cause the false dismissal probability of PDCCH to increase.

Preferably, described CCE initial value determining unit adopts following formula to carry out smoothly the spectrum efficiency of the PDCCH of described equivalence, obtains the spectrum efficiency eff of the PDCCH after level and smooth _{pDCCH_new};

eff _{PDCCH_new}(i)＝(1-α)·eff _{PDCCH_new}(i-1)+α·eff _PDCCH

Wherein, i represents current C QI report cycle point, and α represents default smoothing factor, eff _pDCCHthe spectrum efficiency that represents the PDCCH of described equivalence.

Preferably, described CCE initial value determining unit is according to the spectrum efficiency of described PDCCH after level and smooth, while determining the initial value of CCE, specifically for:

According to spectrum efficiency and the Downlink Control Information DCI length of described PDCCH after level and smooth, with reference to the spectrum efficiency of PDCCH and the mapping relations table of the initial value of CCE under this default DCI length, determine the initial value of CCE.

DCI for different length arranges different CCE and the threshold value of spectrum efficiency, passes through V parameter _{add_sum}embody the performance difference of PDSCH and PDCCH, make the CCE selecting more reasonable, on the basis that guarantees PDCCH performance, effectively promote the capacity of PDCCH.

Preferably, described judging unit specifically for:

It is undetected whether judgement adopts after current CCE polymerization grade UE to exist, if so, and V _add=-Kstep, otherwise, V _add=step;

Wherein, V _addthe CCE grade that represents this adjustment PDCCH, K represents the CCE level adjustment step-length of PDCCH of intoo drastic biopsy survey and the ratio of the CCE level adjustment step-length of the PDCCH that too drastic biopsy is surveyed preset, after step represents that the too drastic biopsy of default PDCCH is surveyed, the CCE level adjustment step-length that this PDCCH is corresponding.

Preferably, described determining unit is utilized following formula, according to this, adjusts the CCE grade of PDCCH, and the initial value of CCE, redefines the CCE polymerization grade of current employing:

V _{add_sum}＝V _{add_sum}+V _add

Redefine CCE polymerization grade=floor (CCE of current employing _init+ V _{add_sum})

Wherein, V _addthe CCE grade that represents this adjustment PDCCH, floor () represents to round downwards, CCE _initthe initial value that represents CCE.

Preferably,

If floor is (CCE _init+ V _{add_sum}) equaling 1, the CCE polymerization grade of the current employing that described determining unit redefines is 1;

If floor is (CCE _init+ V _{add_sum}) equaling 2, the CCE polymerization grade of the current employing that described determining unit redefines is 2;

If floor is (CCE _init+ V _{add_sum}) equaling 3, the CCE polymerization grade of the current employing that described determining unit redefines is 4;

If floor is (CCE _init+ V _{add_sum}) equaling 4, the CCE polymerization grade of the current employing that described determining unit redefines is 8.

In sum, the present invention no longer binds the performance of the performance of PDCCH and PDSCH, passes through V parameter _{add_sum}embody the performance difference of PDSCH and PDCCH, during simultaneously to initial selected CCE grade, the spectrum efficiency of PDCCH is carried out smoothly, makes the CCE selecting more reasonable, effectively promotes the capacity of PDCCH on the basis that guarantees PDCCH performance.

Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, implement software example or in conjunction with the form of the embodiment of software and hardware aspect completely.And the present invention can adopt the form that wherein includes the upper computer program of implementing of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) of computer usable program code one or more.

The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be in computer program instructions realization flow figure and/or block diagram each flow process and/or the flow process in square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction of carrying out by the processor of computer or other programmable data processing device is produced for realizing the device in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.

These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame on computer or other programmable devices.

Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.

Claims (16)

1. a control channel unit CCE polymerization classification method, is characterized in that, the method comprises:

The channel quality indicator (CQI) report cycle setting in advance at each, according to different multiple-input, multiple-output MIMO transmission meanss, revises the spectrum efficiency of physical down link sharing channel PDSCH, obtains the spectrum efficiency of equivalent PDCCH;

According to the spectrum efficiency of the PDCCH of described equivalence, determine the initial value of CCE;

It is undetected whether judgement adopts after current CCE polymerization grade UE to exist, and determine that according to judged result this adjusts the CCE grade of PDCCH;

According to this, adjust the CCE grade of PDCCH, and the initial value of CCE, redefine the CCE polymerization grade of current employing.

2. method according to claim 1, is characterized in that, adopts following formula to revise the spectrum efficiency of PDSCH, obtains the spectrum efficiency of equivalent PDCCH:

eff _PDCCH＝eff _PDSCH+Δ

Wherein, eff _pDCCHthe spectrum efficiency that represents the PDCCH of described equivalence, eff _pDSCHthe spectrum efficiency that represents PDSCH, Δ represents to obtain by different MIMO transmission means corrections according to the spectrum efficiency of PDSCH the adjusted value of the spectrum efficiency of PDCCH, when the MIMO of PDSCH transmission means is SFBC, Δ=0, when the MIMO of PDSCH transmission means is single current wave beam forming, Δ is negative value, when PDSCH is the MIMO transmission means of Open-Loop Spatial Multiplexing or dual-stream beamforming, Δ be on the occasion of.

3. method according to claim 2, is characterized in that, according to the spectrum efficiency of the PDCCH of described equivalence, determines the initial value of CCE, comprising:

The spectrum efficiency of the PDCCH of described equivalence is carried out smoothly, obtain the spectrum efficiency of the PDCCH after level and smooth;

According to the spectrum efficiency of described PDCCH after level and smooth, determine the initial value of CCE.

4. method according to claim 3, is characterized in that, adopts following formula to carry out smoothly the spectrum efficiency of the PDCCH of described equivalence, obtains the spectrum efficiency eff of the PDCCH after level and smooth _{pDCCH_new};

eff _{PDCCH_new}(i)＝(1-α)·eff _{PDCCH_new}(i-1)+α·eff _PDCCH

Wherein, i represents current C QI report cycle point, and α represents default smoothing factor, eff _pDCCHthe spectrum efficiency that represents the PDCCH of described equivalence.

5. method according to claim 3, is characterized in that, according to the spectrum efficiency of described PDCCH after level and smooth, determines the initial value of CCE, comprising:

According to spectrum efficiency and the Downlink Control Information DCI length of described PDCCH after level and smooth, with reference to the spectrum efficiency of PDCCH and the mapping relations table of the initial value of CCE under this default DCI length, determine the initial value of CCE.

6. method according to claim 1, is characterized in that, it is undetected whether judgement adopts after current CCE polymerization grade UE to exist, and determines that according to judged result this adjusts the CCE grade of PDCCH, comprising:

It is undetected whether judgement adopts after current CCE polymerization grade UE to exist, if so, and V _add=-Kstep, otherwise, V _add=step;

Wherein, V _addthe CCE grade that represents this adjustment PDCCH, K represents the CCE level adjustment step-length of PDCCH of intoo drastic biopsy survey and the ratio of the CCE level adjustment step-length of the PDCCH that too drastic biopsy is surveyed preset, after step represents that the too drastic biopsy of default PDCCH is surveyed, the CCE level adjustment step-length that this PDCCH is corresponding.

7. method according to claim 6, is characterized in that, utilizes following formula, according to this, adjusts the CCE grade of PDCCH, and the initial value of CCE, redefines the CCE polymerization grade of current employing, comprising:

V _{add_sum}＝V _{add_sum}+V _add

Redefine CCE polymerization grade=floor (CCE of current employing _init+ V _{add_sum})

Wherein, V _addthe CCE grade that represents this adjustment PDCCH, floor () represents to round downwards, CCE _initthe initial value that represents CCE.

8. method according to claim 7, is characterized in that,

If floor is (CCE _init+ V _{add_sum}) equaling 1, the CCE polymerization grade of the current employing redefining is 1;

If floor is (CCE _init+ V _{add_sum}) equaling 2, the CCE polymerization grade of the current employing redefining is 2;

If floor is (CCE _init+ V _{add_sum}) equaling 3, the CCE polymerization grade of the current employing redefining is 4;

If floor is (CCE _init+ V _{add_sum}) equaling 4, the CCE polymerization grade of the current employing redefining is 8.

9. a control channel unit CCE polymerization classification device, is characterized in that, this device comprises:

Equivalent unit, for the channel quality indicator (CQI) report cycle setting in advance at each, according to different multiple-input, multiple-output MIMO transmission meanss, revises the spectrum efficiency of physical down link sharing channel PDSCH, obtains the spectrum efficiency of equivalent PDCCH;

CCE initial value determining unit, for according to the spectrum efficiency of the PDCCH of described equivalence, determines the initial value of CCE;

Judging unit, for judging that to adopt after current CCE polymerization grade UE whether to exist undetected, and determines that according to judged result this adjusts the CCE grade of PDCCH;

Determining unit, for adjust the CCE grade of PDCCH according to this, and the initial value of CCE, redefines the CCE polymerization grade of current employing.

10. device according to claim 9, is characterized in that, described equivalent unit adopts following formula to revise the spectrum efficiency of PDSCH, obtains the spectrum efficiency of equivalent PDCCH:

eff _PDCCH＝eff _PDSCH+Δ

Wherein, eff _pDCCHthe spectrum efficiency that represents the PDCCH of described equivalence, eff _pDSCHthe spectrum efficiency that represents PDSCH, Δ represents to obtain by different MIMO transmission means corrections according to the spectrum efficiency of PDSCH the adjusted value of the spectrum efficiency of PDCCH, when the MIMO of PDSCH transmission means is SFBC, Δ=0, when the MIMO of PDSCH transmission means is single current wave beam forming, Δ is negative value, when PDSCH is the MIMO transmission means of Open-Loop Spatial Multiplexing or dual-stream beamforming, Δ be on the occasion of.

11. devices according to claim 10, is characterized in that, described CCE initial value determining unit specifically for:

The spectrum efficiency of the PDCCH of described equivalence is carried out smoothly, obtain the spectrum efficiency of the PDCCH after level and smooth;

According to the spectrum efficiency of described PDCCH after level and smooth, determine the initial value of CCE.

12. devices according to claim 11, is characterized in that, described CCE initial value determining unit adopts following formula to carry out smoothly the spectrum efficiency of the PDCCH of described equivalence, obtain the spectrum efficiency eff of the PDCCH after level and smooth _{pDCCH_new};

eff _{PDCCH_new}(i)＝(1-α)·eff _{PDCCH_new}(i-1)+α·eff _PDCCH

Wherein, i represents current C QI report cycle point, and α represents default smoothing factor, eff _pDCCHthe spectrum efficiency that represents the PDCCH of described equivalence.

13. devices according to claim 11, is characterized in that, described CCE initial value determining unit is according to the spectrum efficiency of described PDCCH after level and smooth, while determining the initial value of CCE, specifically for:

According to spectrum efficiency and the Downlink Control Information DCI length of described PDCCH after level and smooth, with reference to the spectrum efficiency of PDCCH and the mapping relations table of the initial value of CCE under this default DCI length, determine the initial value of CCE.

14. devices according to claim 9, is characterized in that, described judging unit specifically for:

It is undetected whether judgement adopts after current CCE polymerization grade UE to exist, if so, and V _add=-Kstep, otherwise, V _add=step;

Wherein, V _addthe CCE grade that represents this adjustment PDCCH, K represents the CCE level adjustment step-length of PDCCH of intoo drastic biopsy survey and the ratio of the CCE level adjustment step-length of the PDCCH that too drastic biopsy is surveyed preset, after step represents that the too drastic biopsy of default PDCCH is surveyed, the CCE level adjustment step-length that this PDCCH is corresponding.

15. devices according to claim 14, is characterized in that, described determining unit is utilized following formula, according to this, adjust the CCE grade of PDCCH, and the initial value of CCE, redefine the CCE polymerization grade of current employing:

V _{add_sum}＝V _{add_sum}+V _add

Redefine CCE polymerization grade=floor (CCE of current employing _init+ V _{add_sum})

Wherein, V _addthe CCE grade that represents this adjustment PDCCH, floor () represents to round downwards, CCE _initthe initial value that represents CCE.

16. devices according to claim 15, is characterized in that,

If floor is (CCE _init+ V _{add_sum}) equaling 1, the CCE polymerization grade of the current employing that described determining unit redefines is 1;

If floor is (CCE _init+ V _{add_sum}) equaling 2, the CCE polymerization grade of the current employing that described determining unit redefines is 2;

If floor is (CCE _init+ V _{add_sum}) equaling 3, the CCE polymerization grade of the current employing that described determining unit redefines is 4;

If floor is (CCE _init+ V _{add_sum}) equaling 4, the CCE polymerization grade of the current employing that described determining unit redefines is 8.